Solve the problem.The formula 
models the safe maximum speed, v, in miles per hour, at which a car can travel on a curved road with radius of curvature, r, in feet. A highway crew measures the radius of curvature at an exit ramp as 490 feet. What is the maximum safe speed?
A. 32 miles per hour
B. 35 miles per hour
C. 49 miles per hour
D. 40 miles per hour
Answer: B
Mathematics
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Add or subtract. Write the answer in lowest terms.
+ 
A. 
B. 
C. 6y
D. 0
Mathematics
Use properties of rational exponents to simplify the expression. Assume that any variables represent positive numbers.x7/8? x1/8
A. x7/64
B. x
C. 
D. x7/8
Mathematics
Perform the indicated operations. Write the resulting polynomial in standard form.(7x5 + 6x2 - 9x) + (3x5 - 3x2 - 9x)
A. -5x8 B. 10x + 3x5 - 18x2 C. 10x5 + 3x2 - 18x D. -6x5 + 4x2 - 3x
Mathematics
Multiply both sides of each equation by a common denominator to eliminate the fractions. Then solve the system.
- 
= - 
= 
A. 
B. 
C. 
D. 
Mathematics